Technical standardization of laparoscopic lymphatic sparing varicocelectomy in children using isosulfan blue

PurposeThe lymphatic preservation to prevent hydrocele formation after laparoscopic varicocelectomy is essential. Lymphatic sparing procedures using scrotal injection give a rate of mapping failures of 20%–30%. The aim of the present study is to standardize the technique of injection to perform a lymphatic sparing procedure in case of laparoscopic varicocelectomy.MethodsWe retrospectively evaluated 50 patients who underwent laparoscopic varicocelectomy from July 2010 to July 2013. Patients were divided into two groups: G1 (25 patients) those who underwent a classical isosulfan blue scrotal intra-dartos injection and G2 (25 patients) those who underwent the new standardized isosulfan blue scrotal intra-dartos/intra-testicular injection.ResultsIn G1 lymphatic vessels were identified as blue coloured in 19/25 of cases (76%), in G2 in 25/25 of cases (100%). The results were analyzed using test χ2 with Yates' correction and there was a statistically significant difference (χ2 = 0.05,1) between G2 and G1. Postoperative hydrocele was noted in 2/6 patients of G1 in whom the lymphatic vessels were not identified.ConclusionsLaparoscopic lymphatic sparing varicocelectomy is an effective procedure to adopt in children with varicocele. The intra-dartos/intra-testicular injection of isosulfan blue is significantly better than the previously described intra-dartos injection, permitting to identify lymphatic vessels in 100% of cases in our series. No allergy to isosulfan blue was reported in both groups.